Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

SOUTHWEST · FLIGHT WN 4156 SCHEDULED · TYPICAL SCHEDULE

Tuesday, September 29 Yesterday

WN 4156 · BOS → DEN

departs 5:00 AM ET · arrives 7:25 AM MT

Forecast issued Tue 10:00 PM ET · 17h after departure

WN 4156 isn’t flying BOS → DEN on Tue, Sep 29

This listing came from a typical schedule. According to the FAA, WN 4156 flies these legs that day:

SAN → SMF · 3:25 PM · landed
SMF → PDX · 5:24 PM · landed
SMF → PDX · 5:28 PM · scheduled
SMF → PDX · 8:26 AM · landed
SMF → PDX · 8:37 AM · scheduled
PDX → DEN · 10:47 AM · landed
PDX → DEN · 10:47 AM · scheduled